Two-axis settle window in milliseconds. A pick fires only after BOTH
the mouse and the pick buffer (camera/geometry) have been stable for
this long. 120 ms matches the standard tooltip-appearance delay used
by browsers and IDEs — short enough to feel responsive, long enough
to filter out cursor jitter and per-frame camera ticks.
Two-axis settle window in milliseconds. A pick fires only after BOTH the mouse and the pick buffer (camera/geometry) have been stable for this long. 120 ms matches the standard tooltip-appearance delay used by browsers and IDEs — short enough to feel responsive, long enough to filter out cursor jitter and per-frame camera ticks.